I can make up whole passages and make a very big review out of this, but there's no need for that. I will tell you that I watch a large variety of anime and that I'm at the moment I'm writing this 28 years old. One might say that this anime is childish and also drawn that way and at some point I could agree with that, but if you bring up those reasons to not see this anime, get out of my sight!
This is by far the cutest and most addictive anime I've ever seen.
It surely helps I am a cat lover and have one myself that is also a bit crazy and above all craves attention, but even if you don't like cats, it's hard not to be affected by Chi's spell.
The themesong is also amazing, just hearing the first second of it already makes me smile.
Basically what I'm saying here, if you haven't seen this yet, go see it now!
The only reason not to is if you have cute-fobia.